Laserfiche WebLink
SECTION 1.0 <br /> INTRODUCTION <br /> Water table elevation data were evaluated using AgtesolvTm groundwater software to estimate <br /> the hydraulic conductivity for the water-bearing zone screened in each respective monitoring <br />' well Hydraulic conductivity estimates were then used to estimate the groundwater velocity <br /> Task 4—Estimation of Petroleum Hydrocarbon Mass in Soil and Groundwater <br /> As part of the data evaluation the vertical and horizontal extent ofdr etroleum hydrocarbons y ocarbons m <br /> groundwater, based on groundwater monitoring data from the March/Apnl 1999 groundwater <br /> monitoring event and the discrete vertical groundwater sampling, was estimated In addition, the <br /> historical soil analytical data were depicted horizontally and vertically to evaluate the extent of <br /> petroleum hydrocarbons in soil These data used to estimate the mass of petroleum hydrocarbons <br /> in soil and groundwater <br /> Task 5—Natural Attenuation Evaluation <br /> Natural attenuation of TPH-g and benzene were evaluated using current and historical <br /> groundwater monitoring data, inorganic analyses (nitrate and sulfate), and water quality <br /> parameters (pH, conductivity, and dissolved oxygen) <br /> Task 6—Additional Groundwater Study Report <br /> Task 6 included the generation of this report to document the results of the discrete vertical <br /> groundwater sampling, review of groundwater wells within 500 feet, and evaluation of <br /> petroleum-hydrocarbon mass, characteristics, and natural attenuation at the site The final Human <br /> Health Risk Assessment and Groundwater Impact Analysis, and the evaluation of potential <br /> remediation alternatives will be completed as separate reports <br /> S IPROA41040100041SHOP101SHOPIOSADOC 1-4 URS Greiner Woodward Clyde <br />